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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b895e442f19022de2af03bc8b83824834050c9d4987848c5df13f0f499d556f' 
  AND token = 'SXpujnMQInXpciu/jGCNVyXuqMX6Ch8nFv9C+0buFGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}